feat(ui): add locales and split catalogs

Adds Spanish, French, Russian, Japanese, and Simplified Chinese catalogs and wires supported locales into the i18n layer.

packages/ui/src/lib/i18n/messages/ja/folderSelection.ts

@@ -0,0 +1,34 @@
+export const folderSelectionMessages = {
+  "folderSelection.logoAlt": "CodeNomad ロゴ",
+  "folderSelection.tagline": "フォルダを選択して AI でコーディングを開始",
+
+  "folderSelection.links.github": "CodeNomad の GitHub",
+  "folderSelection.links.githubStars": "CodeNomad の GitHub スター",
+  "folderSelection.links.discord": "CodeNomad の Discord",
+
+  "folderSelection.empty.title": "最近使ったフォルダはありません",
+  "folderSelection.empty.description": "フォルダを選択して開始",
+
+  "folderSelection.recent.title": "最近使ったフォルダ",
+  "folderSelection.recent.subtitle.one": "{count} 件のフォルダ",
+  "folderSelection.recent.subtitle.other": "{count} 件のフォルダ",
+  "folderSelection.recent.remove": "履歴から削除",
+
+  "folderSelection.browse.title": "フォルダを参照",
+  "folderSelection.browse.subtitle": "コンピュータ上の任意のフォルダを選択",
+  "folderSelection.browse.button": "フォルダを参照",
+  "folderSelection.browse.buttonOpening": "開いています...",
+
+  "folderSelection.advancedSettings": "詳細設定",
+
+  "folderSelection.hints.navigate": "移動",
+  "folderSelection.hints.select": "選択",
+  "folderSelection.hints.remove": "削除",
+  "folderSelection.hints.browse": "参照",
+
+  "folderSelection.loading.title": "インスタンスを起動中...",
+  "folderSelection.loading.subtitle": "ワークスペースを準備しています。しばらくお待ちください。",
+
+  "folderSelection.dialog.title": "ワークスペースを選択",
+  "folderSelection.dialog.description": "コーディングを開始するワークスペースを選択してください。",
+} as const